D-Link DWL-2210AP Product Manual - Page 180

Glossary SNMP consists of managed devices and their agents, and a management system. The agents store data about their devices in Management Information Bases (MIBs) and return this data to the SNMP management system when requested. SSID The Service Set Identifier (SSID) is a thirty-two character alphanumeric key that uniquely identifies a wireless local area network. It is also referred to as the Network Name. There are no restrictions on the characters that may be used in an SSID. Static IP Address See IP Address. STP The Spanning Tree Protocol (STP) an IEEE 802.1 standard protocol (related to network management) for MAC bridges that manages path redundancy and prevents undesirable loops in the network created by multiple active paths between client stations. Loops occur when there multiple routes between access points. STP creates a tree that spans all of the switches in an extended network, forcing redundant paths into a standby, or blocked, state. STP allows only one active path at a time between any two network devices (this prevents the loops) but establishes the redundant links as a backup if the initial link should fail. If STP costs change, or if one network segment in the STP becomes unreachable, the spanning tree algorithm reconfigures the spanning tree topology and reestablishes the link by activating the standby path. Without spanning tree in place, it is possible that both connections may be simultaneously live, which could result in an endless loop of traffic on the LAN Subnet Mask A Subnet Mask is a number that defines which part of an IP address is the network address and which part is a host address on the network. It is shown in dotted-decimal notation (for example, a 24-bit mask is shown as 255.255.255.0) or as a number appended to the IP address (for example, 192.168.2.0/24). The subnet mask allows a router to quickly determine if an IP address is local or needs to be forwarded by performing a bitwise AND operation on the mask and the IP address. For example, if an IP address is 192.168.2.128 and the netmask is 255.255.255.0, the resulting Network address is 192.168.2.0. The bitwise AND operator compares two bits and assigns 1 to the result only if both bits are 1. The following table shows the details of the netmask: IP address 192.168.2.128 11000000 10101000 00000010 10000000 Netmask 255.255.255.0 11111111 11111111 11111111 00000000 Resulting network address 192.168.2.0 11000000 10101000 00000010 00000000 Supported Rate Set The supported rate set defines the transmission rates that are available on this wireless network. A station may be able to receive data at any of the rates listed in this set. All stations must be able to receive data at the rates listed in the Basic Rate Set. 180